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The Scite project has a corpus of millions of scientific articles that it has analyzed with deep learning tools to determine whether any given paper has been supported or contradicted by subsequent publications; you can check Scite via the website, or install a browser plugin version (Firefox, Chrome). (Thanks, Josh!)
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One of the more extravagant claims made by tech companies is that they can detect emotions by analyzing photos of our faces with machine learning systems. The premise is sometimes dressed up in claims about "micro-expressions" that are below the threshold of human detection, though some vendors have made billions getting security agencies to let them train officers in "behavior detection" grounded in this premise.
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Every Monday I extract the top comments from the top posts of some of the most popular subreddits through the Reddit API. Each comment gets parsed into sentences and analyzed using the NLTK Sentiment Analyzer Vader Module which scores them based on how positive, negative, and neutral they are. Subreddits are ranked from most positive to least positive in the table below.

On August 6, artist Todd Vaziri observed that all of Trump's angry tweets come from the Twitter client for Android, while the more presidential, less batshit ones come from an Iphone; Vaziri speculated that the latter were sent by a staffer. Read the rest